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New format for Korean patent application numbers in CA/CAplus increases consistency, saves time

03. November 2010

Numerous Korean patent application numbers (/AP) and priority application numbers (/PRN) in the CA/CAplus family of databases formerly consisted of six digits. A new seven-digit format has been adopted to ensure conformity among the CA/CAplus family and other important STN databases.

The new format contains a zero (0) inserted immediately following the 7, which is always the first of the seven characters in the serial number (see example below). This change applies to 90,000 Korean application numbers and to approximately 3,000 priority application numbers in patents from 1999 to the present.

The new format will make crossover searching easier and will save you time by ensuring that patent number crossovers among STN patent databases are comprehensive.

Format for Korean Patent Application Number and Priority Application Number:

Previous format: KR YYYY-7nnnnn (e.g., KR 2000-710051)
New format: KR YYYY-70nnnnn (e.g., KR 2000-7010051)